BUZ31L H N-Channel MOSFET 200V 13.5A Equivalent & Substitute Parts

Part Overview

The BUZ31L H is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 200V drain-to-source voltage with 13.5A continuous drain current at 25°C. This device is part of the SIPMOS® series and is designed for through-hole mounting in TO-220-3 package configuration. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, on-resistance characteristics, and thermal performance while accommodating available active or recently active alternatives.

Substiute Parts

BUZ31L H

Infineon TechnologiesIn Stock: 15235BUZ31L H Datasheet

Current PartRFQ

IRF200B211

Infineon TechnologiesIn Stock: 7114IRF200B211 Datasheet

MFR RecommendedRFQ

IRL640A

onsemiIn Stock: 1639IRL640A Datasheet

MFR RecommendedRFQ

PHP20NQ20T,127

NXP SemiconductorsIn Stock: 9905PHP20NQ20T,127 Datasheet

MFR RecommendedRFQ

STP19NF20

STMicroelectronicsIn Stock: 1420STP19NF20 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BUZ31L H is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Drain-to-Source Voltage (Vdss): Must equal or exceed 200V
• Continuous Drain Current (Id): Must equal or exceed 13.5A at 25°C
• Package Type: Must be TO-220-3 or TO-220AB (mechanically compatible through-hole packages)
• FET Type: Must be N-Channel Metal Oxide MOSFET
• Gate-Source Voltage (Vgs Max): Must accommodate ±20V rating

Secondary Compatibility Parameters:

• On-Resistance (Rds On): Lower values indicate improved performance; maximum acceptable is determined by thermal and application requirements
• Power Dissipation: Must support thermal requirements of the application
• Operating Temperature Range: Must cover the required operating window

The four substitute parts identified (IRF200B211, IRL640A, PHP20NQ20T,127, and STP19NF20) meet these criteria with variations in current capacity, on-resistance, and product status. Each substitute maintains the 200V voltage rating and TO-220 package family compatibility while offering different current and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Priority:

PHP20NQ20T,127 (NXP Semiconductors) and STP19NF20 (STMicroelectronics) are recommended as primary substitutes due to active product status. Both parts exceed the BUZ31L H current rating (20A and 15A respectively versus 13.5A) and maintain 200V voltage compatibility. PHP20NQ20T,127 offers superior on-resistance (130 mOhm) and higher power dissipation capability (150W), providing design margin. STP19NF20 provides a closer current match (15A) with moderate on-resistance improvement (160 mOhm) and active product support.

For Thermal Performance:

IRL640A (onsemi) delivers the highest power dissipation rating (110W) and improved on-resistance (180 mOhm) with 18A current capacity. Although classified as obsolete, this part remains suitable for applications requiring thermal headroom. The 5V gate drive voltage matches the BUZ31L H specification.

For Compliance and Long-Term Support:

IRF200B211 (Infineon) maintains manufacturer continuity with active product status and ROHS3 compliance. Current rating of 12A is slightly below the original specification but acceptable for applications not requiring full 13.5A capacity. Extended operating temperature range (-55°C to 175°C) provides additional margin.

Package Compatibility:

All substitute parts use TO-220 family packages (TO-220-3 or TO-220AB), ensuring mechanical and thermal interface compatibility with existing PCB layouts and heat sink mounting configurations.

Frequently Asked Questions (FAQ)

Q: Can IRF200B211 replace BUZ31L H in all applications?

A: IRF200B211 is suitable for applications where continuous drain current does not exceed 12A. The 200V voltage rating and TO-220AB package provide electrical and mechanical compatibility. Applications requiring the full 13.5A rating should use IRL640A, PHP20NQ20T,127, or STP19NF20.

Q: What is the difference between TO-220-3 and TO-220AB packages?

A: Both are through-hole TO-220 family packages with identical pin pitch and thermal interface characteristics. TO-220AB is a variant designation used by some manufacturers. All substitute parts are mechanically compatible with existing TO-220-3 PCB footprints.

Q: Why is PHP20NQ20T,127 rated for 20A when BUZ31L H is only 13.5A?

A: Higher current rating indicates greater current-carrying capacity under the same thermal conditions. PHP20NQ20T,127 can be used in BUZ31L H applications without derating. The 20A rating provides design margin and allows for future application scaling.

Q: Are there temperature range limitations when substituting?

A: BUZ31L H operates from -55°C to 150°C. IRF200B211 and PHP20NQ20T,127 extend to 175°C, providing additional margin. IRL640A and STP19NF20 match the original -55°C to 150°C range. Verify application temperature requirements before selection.

Q: What does on-resistance (Rds On) mean for substitution?

A: On-resistance determines power loss during conduction. Lower Rds On values reduce heat generation. All substitute parts show equal or improved on-resistance compared to BUZ31L H (200 mOhm), resulting in lower power dissipation and improved efficiency.

Q: Can I use IRL640A as a direct replacement despite obsolete status?

A: IRL640A meets all electrical and mechanical compatibility requirements. Obsolete status indicates discontinued manufacturing but does not affect functional performance. Use is acceptable if inventory is available and long-term supply is not a constraint.

Q: Which substitute offers the best overall compatibility?

A: STP19NF20 provides optimal balance: active product status, 15A current rating (exceeds 13.5A requirement), improved on-resistance (160 mOhm), matching temperature range (-55°C to 150°C), ROHS3 compliance, and TO-220 package compatibility.